Fluid-fuel burner.



PATENTED MAY 23, 1905. E. H. LYNN.

zsHLmTs-SHBT 1.

.n .j n@

FLUID FUEL BURNER. APPLICATION FILED SEPT. 15, 1904.

'M wl. 1 n w Q1 w PATENTED MAY 23, 1905.

l U. H. LYNN.

FLUID PULL BURNER.

APPLICATION FILED SEPT. l5, 1904.

2 SHBETSSHBBT 2.

111/ [Iliff/1111 1,1111

Patented May 23, 19U5.

PATENT Fries.

FRANCIS H. LYNN, OF SAN FRANCISCO, CALIFORNIA.

FLUID-FUEL BURNER.

SPECIFICATION forming part of Letters Patent No. 790,734, dated May 23,1905.

Application led September 15, 1904. Serial No. 224,497.

To @ZZ whom, it may concern:

Be itknown that I, FRANCIS H. LYNN, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements inFluid-Fuel Burners, of which the following is a specification.

This invention relates to fluid-fuel burners, the object of theinvention being to provide a burner by means of which intense heat maybe generated for the reduction of ores, the heating and melting ofmetal, and for the generation ofheat for any other desired purposes,whichshall be compact in form and of small size, so that it can readilybe carried about and used wherever needed, and may be used to burngasolene, distillates, and certain grades of coal-oil or fuel-gas, ifdesired.

In the accompanying drawings, Figure 1 is a perspective view of myimproved burner, the front wall of the casing being broken away to showthe interior thereof. Fig. 2 is a cross-section of the gas-deliverychamber, and Fig. 3 is ahorizontal section immediately above thenozzles.

Referring to the drawings, 1 represents a suitable casing, having a flatbottom 2 and a vcurved top 3, terminating in straight vertical sides 4,extending to said bottom. The casing is covered at the front and rear,respectively, by a front wall 5 and a rear wall 6, the front wall havingan aperture 7 suflioiently large to permit the entrance of the twinnozzles 8, while the rear wall has also a circular aperture 9, throughwhich the iames pass, said aperture being surrounded bya flange 10,extending parallel with the general direction of the iiames. This flange10 may, however, be omitted when desired. Within the casing are twohelical coils 11 12 of pipe, in which the gas to be burned is generated.One of these coils, 11, lies within the other, 12. The inner coil issuliiciently rigid to support itself upon the terminal portions of theooil, while the outer coil 12 is supported by upwardlyextending arms 13from an ignition-plate 14, resting upon the bottom of the casing. Theiiuid fuel, supplied by a pipe 15, is conducted by two lateral branches16, controlled by valves 18 to the ends of the coils in the rear of thecasing, so that the iiuid travels in said ooils from the rear to thefront of the casing. It is then conducted by bent pipes 20 and elbows 21into gas-delivery chambers 22, into each of which is screwed a gas-pipe23, through which the gas emerges with great velocity into mixingchambers or nozzles 8. Into these mixing chambers the air is drawnthrough an aperture 25 by suction on account of the high velocity of thejet of gas, and the air and gas are thoroughly commingled therein. Fromsaid mixing chambers or nozzles the mixtures of gases for combustionemerge with great force and are burned at the open extremities 26 of thenozzles, each of which is cut at its end at a small inclination with itsaxis. These nozzles being tubular in form, the cut ends are in the formof ellipses of great eccentricity. These openings 26 in the ends of theair-chambers face each other at a short distance. Each burner has twoswivel connections 27 28 with the end of its corresponding coil, so thatby properly turningthe bent pipes 2O upon the ends of the coils and thenozzles and parts secured thereto upon the bent pipes 20 the openings 26in the nozzles can be moved to or from each other, or the nozzles may bemoved in or out of the casing, more or less, according to the use towhich the burner is to be put. The end of each coil where it turnsupward to connect with the bent pipe 2O has an extension 29, closed by aplug 30. Athird pipe 17, controlled bya valve 19, leads from thejunction of the branches 16 with the supply-pipe to a point above theignition-plate 14 to supply oil thereto to start the operation of theburner.

The operation of the apparatus is therefore as follows: The valve isiirst opened and a suiiioient amount of oil is allowed to flow onto theignition-plate. The valve 19 having been closed and a small supply ofwaste or other suitable material having been placed in theignition-plate, (if the oil used is of too high a grade to burn ofitself,) a light is applied and a fire is started which heats the coils11 12. When these have been sufciently heated, the valves 18 are openedand fluid fuel is admitted to the coils. This fuel, if not already inthe form of gas, is converted into gas by the TOO heat of the coil. Whenthe apparatus has been in use for a suicient length of time, the coils11 12 become very highly heated. In 0rder to more highly heat the coils,the aperture 9 in the rear wall, through which the iiames issue, is madesmaller than the inner coil and small enough to deflect part of theflames from the burner and project said flames under said coils, thusvery highly heating the same. The fluid fuel, if in a liquid form, isvery quickly converted into gas, and this gas in passing through theremainder of the coils becomes very highly heated and is discharged intothe gas-delivery chamber at a high pressure. It then emerges from saidgas-delivery chamber into the nozzle at a very high temperature, andthus heats the air drawn into said nozzle by the suction of the jet ofgas.

A very important feature of my invention is the arrangement of thenozzles, by means of which the mixed gases of combustion from the twoburners impinge against each other at a small angle of deviation fromthe axis of the burner, the iiames resulting from ignition thereof thenproceeding onward along said axis. The value of this arrangement is thatit creates a powerful suction for additional air of combustion drawn inbetween the two bodies of gas and also around the same, so that thegasis thoroughly mixed with amplysuicient air to produce completecombustion, and this in addition to the high temperature imparted to thegas by the coils is the reason why I obtain such an intense heat by thisform of burner. The casing being made of incombus'tible aridnon-conductingmaterial, such as magnesite, retains the heat of the Hamesand reflects the iames through the coils, so that all parts of the coilsare thoroughly heated. The coils are easily maintained free fromdeposits of carbon, because on account of their form and compositionthey are sufficiently elastic that a sharp tap or blow given to the coilknocks olf from the interior surface thereof any deposits of carbon orscale, and these maybe washed or blown out through the openings in theextensions 29.

I claiml. In a fluid-fuel burner, the combination of a casing, coils ofpipe in said casing, a pair of nozzles connected with said coils, saidnozzles extending within` the coils and inclining toward each other at aslight deviation from the axis of the casing, the openings in thenozzles facing each other whereby the combustible gases and flamesissuing from said nozzles impinge against each other and proceed in adirection substantially midway between that of the nozzles, and meansfor supplying iiuid fuel to the coils, substantially as described.

2. In a Huid-fuel burner, the combination of a casing, coils of pipe insaid casing, a pair of nozzles having a double swivel connection withthe coils whereby they may be moved into or drawn out from the coils ormoved to or from each other, said nozzles extending within the coils andinclining toward each other at a slight deviation from the axis of thecasing, the openings in the nozzles facing each other whereby thecombustible gases and flames issuing from said nozzles impinge againsteach other and proceed in a direction substantially midway between thatof the nozzles, and means for supplying fluid fuel to the coils,substantially as described.

3. In a fluid-fuel burner, in combination with the casing,v inner andouter helical coils of pipe therein, means for independently supplyingfluid fuel to 'said coils, movable nozzles within the coils andconnected thereto, the ends of said nozzles having dischargeopeningsfacing each other, the directions of discharge being at small angles tothe direction of the iiame midway between the nozzles, said angles beingsubstantially equal, substantially as described.

4. In a fluid-fuel burner, in combination with the casing, inner andouter helical coils of pipe therein, means for independently supplyingfluid fuel to said coils, movable nozzles within the coils and connectedthereto, the ends of said nozzles having dischargeopenings facing eachother, the directions of discharge being at small angles to thedirection of the flame midway between the nozzles, said angles beingsubstantially equal, the casing having a front'wall with a restrictedopening, through which the ames issue and by which they are partlyreiiected upon the coils, substantially as described.

5. In a fluid-fuel burner, in combination with the casing, inner andouter helical coils of pipe therein, means for independently supplyinguid fuel to said coils, movable nozzles within the coils and connectedthereto, the ends of said nozzles having dischargeopenings facingeachother, the directions of discharge being at small angles to thedirection of the iiame midwayT between the nozzles, said angles beingsubstantially equal, the casing having a front wall with a restrictedopening, through which the flames issue and by which they are partlyreflected upon the coils, and the opening having a flange extendingparallel with the axis of the burner, substantially as described.

In witness whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

FRANCIS H. LYNN.

Witnesses:

FRANCIS M. WRIGHT, Bassin GORFINKEL.

IOO

IIO

